NGK 2309 Spark Plug

NGK Iridium IX Spark Plug for Mitsubishi Lancer

NGK Iridium IX Spark Plug Part Number 2309 is built for precise ignition performance in the 2006 Mitsubishi Lancer. This spark plug uses an iridium center electrode, a copper core, and a tapered-cut ground electrode to support consistent spark delivery and stable combustion.

The NGK Iridium IX Spark Plug line focuses on fine-wire iridium construction and OE-style engineering for drivers who want dependable ignition service. Part Number 2309, also identified as LFR7AIX, is a direct replacement-style spark plug for the listed application.

Key Features

• Iridium center electrode tip material for durable spark performance
• Copper center electrode core material for efficient heat transfer
• Taper cut ground electrode tip design
• Standard ground configuration with one ground electrode
• 5,000 ohm resistance
• Flat seat design
• 14.00 mm thread diameter and 26.5 mm reach
• 5/8 hex size for service access
• Manufacturer heat range 7
• Pre-gap size: .032

Detailed Description

NGK 2309 is an Iridium IX spark plug engineered for the 2006 Mitsubishi Lancer and other listed interchange applications. The iridium tip supports a fine spark point, while the nickel ground electrode and taper-cut profile help maintain consistent ignition characteristics under normal operating conditions. The non-removable nut terminal and flat seat design match common OE-style service requirements.

For buyers searching for a 2006 Mitsubishi Lancer spark plug, NGK 2309 provides a direct fit reference with the correct thread diameter, reach, heat range, and pre-gap specification. This part cross-references DENSO Auto Parts 5345 for the same application.

What This Spark Plug Helps Address

• Engine misfire caused by worn or fouled spark plugs
• Hard starting from weak ignition output
• Rough idle related to inconsistent spark delivery
• Reduced throttle response from degraded plug performance
• Maintenance replacement for the 2006 Mitsubishi Lancer ignition system

Installation Notes and Tips

Verify the specified gap before installation and confirm the plug matches the vehicle’s thread diameter, reach, seat type, and heat range. Use the listed 0.032 pre-gap as a reference, and follow the vehicle service manual for torque and removal procedures. For search relevance, this part is commonly referenced as NGK 2309 spark plug for 2006 Mitsubishi Lancer applications.

Quality Assurance

NGK is a long-established OE supplier and manufacturer with broad coverage across automotive applications in North America. Part Number 2309 reflects NGK’s OE-focused manufacturing approach and established ignition component expertise.